IEM that is balanced but fun?

I had purchased the PFE232 because I thought their v-shaped signature would be fun and energetic. I was wrong because their mids were too recessed for me and I wasn't impressed, they definitely weren't fun for me. After returning them, I tried looking for a mid-centric model here at head-fi, but I listen to a lot of rock and metal, and many mid-centric IEMs lack enough energy for these genres. So my question is, which IEM here is balanced, but fun/energetic? I want the mids to be present because I listen to vocal oriented music and I'm sensitive to mid recession. I don't care how much bass and treble there is as long as it fits my criteria of balanced but energetic. From what I read, the UE900 and the Heir 4.Ai might fit my criteria. Also, I want the IEM to isolate well.

The Sony EX1000 are balanced yet fun to listen because it's dynamic sounding with rich details showing in mids ,highs, good punchy bass and wide soundstage. The others IEMs which are balanced yet fun sounding are like UE TF10Pro, JVC FX700, SM3, Westone 3 and UM3x. BTW CK100Pro willbe good match too for these genres music and it offers very detailed soundquality.